code: def backend(converter):
      ConverterRegistry.backends[converter.name] = converter
      return converter
  
file_path: turicreate/src/external/coremltools_wrap/coremltools/coremltools/converters/mil/converter.py
imports: from coremltools.converters._profile_utils import _profile
  from .mil.passes.common_pass import common_pass
label_desc: Use image node_id 2 for calling the ConverterRegistry obj's underlying member method code with example usage: obj.backend(converter) and returns: converter